SOUTH HADLEY — A chain link fence enclosed the burned-out shell of Brunelle’s Marina Monday, and a makeshift food service -- a grille under a tent -- was ordered closed by town officials, but the Brunelle family was busy meeting with insurance officials and preparing to rebuild their more than 50-year-old business.

Boaters' access to dock space and the Connecticut River, meanwhile, remained open.

Also Monday, the state Fire Marshal’s office announced that the five-alarm fire that destroyed the Dockside restaurant and several other buildings at the marina on Friday was an accident caused by a failure in the restaurant electrical system.

Marina owner Luke A. Brunelle Jr., who discovered the fire early Friday, met with his insurance adjusters Monday. He said they agree with the Fire Marshal’s determination of cause.

He said his immediate focus is getting water, phone and Internet service back.

The other immediate concern is bringing in a self-contained unit with stove and water so they can resume serving food under the tent. Over the weekend, they offered patrons hot dogs and hamburgers cooked on a grille.

The Board of Health inspector, though, said the family would need more sophisticated food production equipment. Brunelle he hopes to have that by the weekend. Brunelle’s also has a seasonal beer and wine permit.

The restaurant and most of the adjoining buildings will be razed, Brunelle said.

According town records, the property was assessed for $1,125,500 for fiscal 2013.

A contractor was on site Monday to prepare an estimate of the cost to rebuild.

Brunelle’s family has owned and operated the marina since 1959.

No one was in the building at the time of the fire, and no injuries were reported.

Brunelle lives next door to the marina and had said that he heard the building's fire alarms going off around 6 a.m. on the morning of the fire. When he arrived at the building and opened the front door to the restaurant, he was greeted with a wall of smoke.